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【简答题】
He wont believe it ________he sees it with his own eyes. A.until B. as soon as C. aftera 2. The football match will be put off if it________tomorrow A.rained. B rains C. will rain 3. John will be punished(惩罚)________he doesn't take his mothers advice A. if B. unless C. till 4. You can use my dictionary________you return it to me on time. A. unless B. and c as ong as 5. We won't be able to finish the work on time ________we start it right now. A. if B. Unless C. as long as
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参考答案：
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【单选题】甲乙两个做匀速圆周运动的质点,它们的角速度之比为3:1,线速度之比为2:3,质量之比为1:1,那么下列说法中正确的是
A.
它们的半径之比是2:3
B.
它们的向心加速度之比为2:1
C.
它们的周期之比为3:1
D.
它们的向心力之比为1:2
【单选题】只用一种试剂可区别Na,SO、MgCl2、 FeCl、 AI2(SO4)3,(NH4)2SO4五种溶液,这种试剂是
A.
Ba(OH)2
B.
H2SO4
C.
NaOH
D.
AgNO3
【单选题】Passage 2. On average, American kids ages 3 to 12 spent 29 hours a week in school, eight hours more that they did in 1981. They also did more household work and participated in more of such organized ...
A.
children have little time to play with their parents
B.
children are not taken good care of by their working parents
C.
both parents and children suffer from lack of leisure time
D.
both parents and children have trouble managing their time
相关题目：
【单选题】甲乙两个做匀速圆周运动的质点,它们的角速度之比为3:1,线速度之比为2:3,质量之比为1:1,那么下列说法中正确的是
A.
它们的半径之比是2:3
B.
它们的向心加速度之比为2:1
C.
它们的周期之比为3:1
D.
它们的向心力之比为1:2
【单选题】只用一种试剂可区别Na,SO、MgCl2、 FeCl、 AI2(SO4)3,(NH4)2SO4五种溶液,这种试剂是
A.
Ba(OH)2
B.
H2SO4
C.
NaOH
D.
AgNO3
【单选题】Passage 2. On average, American kids ages 3 to 12 spent 29 hours a week in school, eight hours more that they did in 1981. They also did more household work and participated in more of such organized ...
A.
children have little time to play with their parents
B.
children are not taken good care of by their working parents
C.
both parents and children suffer from lack of leisure time
D.
both parents and children have trouble managing their time
参考解析：
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